Add the butter/buttery spread to your instant pot.
Then add water and then the oats. Stir.
Then add cinnamon and apple. Stir
Then close your Instant Pot and make sure you turn the dial to sealing. Select manual high pressure and set for 7 minutes. After the Instant Pot stops cooking, let it count up to 10 more minutes and then turn it off (this is a natural release). The pin should drop down and there should be no steam when you turn the lid and release your instant pot. If you are new to instant pot life, I would make sure you use an oven-safe silicone glove to make sure you are less nervous about opening a steaming pot (there will be no steam from your instant pot valve on this).
Your steel cut oatmeal should be perfect! Add your toppings and dig in.